Okojo-san(オコジョさん) is a Japanese manga series written and illustrated by Ayumi Uno and serialized in LaLa. The chapters were collected into eight tankōbon volumes by Hakusensha and released from 1996 to 2005. The series is about an ermine living as a pet in a small apartment complex. Okojo-san was adapted into a 51-episode anime series titled Shiawase Sou no Okojo-san(しあわせソウのオコジョさん) by the Japanese animation studio Radix, and aired on TV Tokyo from October 2, 2001 to September 24, 2002.